diff --git a/python-s3transfer.spec b/python-s3transfer.spec
index 732a6c4..47bcfab 100644
--- a/python-s3transfer.spec
+++ b/python-s3transfer.spec
@@ -1,5 +1,5 @@
 Name:          python-s3transfer
-Version:       0.3.7
+Version:       0.4.0
 Release:       1mamba
 Summary:       An Amazon S3 Transfer Manager for Python
 Group:         System/Libraries
@@ -48,6 +48,9 @@ sed -i "s,.*/man/.*,&.gz," %{name}.filelist
 # %doc README.rst
 
 %changelog
+* Tue Apr 20 2021 Automatic Build System <autodist@mambasoft.it> 0.4.0-1mamba
+- automatic version update by autodist
+
 * Wed Apr 14 2021 Automatic Build System <autodist@mambasoft.it> 0.3.7-1mamba
 - automatic version update by autodist